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Planaria sp. Kingdom : Animalia Phylum : Platyhelminthes Order : Tricladida Family: Dugesiidae

PHYLUM PLATYHELMINTHES. Planaria sp. Kingdom : Animalia Phylum : Platyhelminthes Order : Tricladida Family: Dugesiidae Class : Turbellaria Genus : Deugesia Common name : Flatworm. General Morphology Of Planaria. gut. epidermis. mesenchyme. neoblasts. rhabdites. General physiology.

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Planaria sp. Kingdom : Animalia Phylum : Platyhelminthes Order : Tricladida Family: Dugesiidae

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  1. PHYLUM PLATYHELMINTHES Planaria sp. Kingdom : Animalia Phylum : Platyhelminthes Order : Tricladida Family: Dugesiidae Class : Turbellaria Genus : Deugesia Common name : Flatworm

  2. General Morphology Of Planaria gut epidermis mesenchyme neoblasts rhabdites

  3. General physiology • Triploblastic (3 layers). 0.5 to 5 cm long. • Unsegmented and flattened dorso-ventrally top to bottom • Respire/excrete by diffusion. • No body cavity other than gut. No anus. • Rhabdoids: Cells that produce mucus and poison for prey immobilization/predator deterrence. • Neoblasts: Small, ameboid like cells that initiate regeneration of lost parts. • Hermaphrodite: contains both female and male sexual structure

  4. Platyhelminthes as parasites • Most platyhelminthes are endoparasites, living within the bodies of many types of animals. • They do not kill their host in order to obtain nutrients; instead, they feed off the living tissues or absorb nutrients within the body of the host.

  5. PHYLUM NEMATODA Ascaris lumbricoides sp.Kingdom : AnimaliaPhylum : NematodaClass : SecernenteaOrder : AscarididaFamily : AscarididaeGenus : AscarisCommon name : Roundworm

  6. Transverse section of Ascarislumbricoides

  7. General physiology • Reach 30cm in length • Triploblastic, bilaterally symmetrical, cylindrical, unsegmented. • Covered flexible, thick cuticle, which is shed as the worm grow. • The body cavity ois a pseudocoelom formed by the fusing of vacuoles in the mesoderm layer. • Have through gut which allows food to be continuosly processed • Heterotrophic • Reproduce by sexual reproduction • Dioecious : The sexes are separated.

  8. References: 1)http://animaldiversity.ummz.umich.edu/site/account/pictures/Platyhelminthes.html. 2)Campbell, Reece, Urry, Cain, Wasserman, Minorsky, Jackson, Biology (8th ed.),University of california, The Benjamin Cummings Publishing Company, Inc.,2008. 3)Lee Soon Ching, Liew Shee Leong, Kamaludin A.Rashid, Jacqueline R.S., Nalini B., Nor Azlina Abd Aziz, Biology For Matriculation SEMESTER 2 Updated,Oxford Fajar,2009.

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